HEC-HMI-C4150-ER

Transcription

HEC-HMI-C4150-ER

USER’S MANUAL
Revision: 1
HEC-HMI-C4150-E-R
Divelbiss Corporation
9778 Mt. Gilead Road,
Fredericktown, Ohio 43019
Toll Free: 1-800-245-2327
Web: http://www.divelbiss.com
Email: [email protected]
2010009F.1
Table of Contents
Manual Contents
Getting Started
How to Use this Manual........................................................................ 4
Configuring the HEC-HMI Target in EZ LADDER Toolkit.......................... 5
Loading the HEC-HMI Kernel................................................................. 6
HEC-HMI Basics
Getting to Know the HEC-HMI............................................................... 9
HEC-HMI Assembly / Disassembly....................................................... 11
Wiring to the HEC-HMI....................................................................... 12
Mounting the HEC-HMI....................................................................... 14
HEC-HMI Specifications....................................................................... 15
HEC-HMI Power
Input Power......................................................................................... 16
Input Power Connections.................................................................... 16
Input Power Monitor........................................................................... 17
Communication Ports
Programming Port............................................................................... 18
Modbus, General Purpose Serial Port................................................. 19
OptiCAN Port / J1939 Port................................................................... 21
User Interface
HMI Display......................................................................................... 24
Display Contrast Control...................................................................... 24
Display Backlight Control..................................................................... 24
Programmable LEDs............................................................................. 24
Status LEDs.......................................................................................... 25
Programmable Buttons........................................................................ 25
Display Heater Control......................................................................... 26
Programmable Horn............................................................................ 26
HEC-HMI-C4150-E-R User’s Manual
Document #: 2010009F.1.pdf
Divelbiss Corporation • 9778 Mt. Gilead Road • Fredericktown, Ohio 43019 • 1-800-245-2327 • www.divelbiss.com
PAGE 1
Table of Contents
Memory
Memory Overview............................................................................... 27
RAM Memory...................................................................................... 27
FLASH Memory.................................................................................... 27
Retentive Memory............................................................................... 28
EEPROM Memory................................................................................ 28
Digital I/O
Digital Inputs Overview....................................................................... 29
Dedicated Inputs................................................................................. 29
Multi-Use Inputs as Digital Inputs....................................................... 30
Multi-Use Inputs as High Speed Counter Inputs.................................. 32
Digital Outputs Overview.................................................................... 34
Solid-State Digital Outputs as General Purpose Outputs.................... 34
Solid-State Digital Outputs as PWM.................................................... 37
Relay Outputs...................................................................................... 39
Analog I/O
Analog Inputs Overview...................................................................... 40
Real World Analog Inputs.................................................................... 40
Solid-State Output Current Feedback.................................................. 41
WARNING!!
The HEC-HMI-C4150, as with other programmable controllers must not be used alone in
applications which could be hazardous to personnel in the event of failure of this device.
Precautions must be taken by the user to provide mechanical and/or electrical safeguards
external to this device. This device is NOT APPROVED for domestic or human medical use.
PAGE 2
Getting Started
This section explains how to read this manual and understand the symbols and information that it contains.
To begin using your HEC HMI, you will need to follow these steps:
• Install EZ LADDER Toolkit if not already installed (not included).
• Configure the HEC HMI in the EZ LADDER Toolkit Project Settings.
• Connect the Input Power and Programming Port.
• Write a ladder diagram program.
• Install the HEC-HMI’s Kernel.
• Download and run the program on the HEC HMI.
Refer to the appropriate sections of this manual for details on the above items.
Getting Started
How to Use this Manual
In this manual, the following conventions are used to distinguish elements of text:
BOLD
italic
SMALL CAPS
Denotes labeling, commands, and literal portions of syntax that must appear exactly as shown.
Used for variables and placeholders that represent the type of text to be entered by the user.
Used to show key sequences or actual buttons, such as OK, where the user clicks the OK button.
In addition, the following symbols appear periodically in the left margin to call the readers attention to specific details in the text:
Warns the reader of a potential danger or hazard associated with certain actions.
Appears when the text contains a tip that is especially useful.
Indicates the text contains information to which the reader should pay particularly close
attention.
All Specifications and Information Subject to Change without Notice
PAGE 4
Getting Started
Configuring the HEC-HMI Target in EZ LADDER Toolkit
Before you can program and use the HEC-HMI, it must be configured as a target within the EZ LADDER Toolkit. For help with installing or using EZ LADDER, please refer to the EZ LADDER User’s Manual.
1. In EZ LADDER, from the File Menu at the top, click PROJECT then SETTINGS. This will open the Project Settings Window.
Select HEC-HMI as the target from the choices. Refer to Figure 1.
Figure 1 - Project Settings Window
2. Click the PROPERTIES button. A new window will open. Select the HEC-HMI-C4150 Model number of the HEC-HMI from the
drop-down menu. Click OK. This will close the HEC-HMI Properties Window, saving the HEC-HMI-C4150 as the target for this
ladder diagram project. Refer to Figure 2.
Figure 2 - HEC-HMI Properties Window
3. Click OK to close the Project Settings Window.
PAGE 5
Getting Started
Loading the HEC-HMI Kernel
THE HEC-HMI WILL NOT FUNCTION UNLESS
KERNEL LOADING (This Step) IS COMPLETED.
The kernel is the firmware for the HMI/Controller and to provide greater flexibility and reliability, HEC-HMI shipments are factory
shipped without a kernel installed. If this is a new unit from the factory, it will be necessary to load the kernel before a ladder program can be downloaded. If the kernel is already loaded, this step is not required. To upgrade a kernel, see the EZ LADDER User’s
Manual.
To install the HEC-HMI-C4150‘s kernel:
1. Verify the target has been configured (see Configuring the HEC-HMI Target in EZ LADDER Toolkit).
2. Connect the Programming cable(s) from the computer to the HEC-HMI. See Programming Port in the HEC-HMI COMPORTs section. Wiring to the Programming Port’s terminal blocks may be required.
3. Create a small one-rung program with a normally open (direct contact) and an output tied together. You may also open a preexisting program for the HEC. EZ LADDER version 1.0.4.4 and later includes a sub-directory (...EZ LADDER\Kernel Install Start Programs\)which has starter programs for each target to load the kernel. Choose GetStarted_HEC-HMI-C4150.dld.
4. Click the
button to compile the program. The HEC-HMI will only accept compiled EZ LADDER Toolkit programs.
5. Click the
button to change EZ LADDER Toolkit from Edit Mode to Monitor Mode. Monitor Mode is required to communicate, download and monitor programs.
6. Click the
button to connect to the HEC-HMI. A dialog will appear automatically when no kernel is loaded. If this dialog
does not appear, click PROJECT then BOOTLOADER. Refer to Figure 3.
Figure 3 - Bootloader Window
PAGE 6
Getting Started
7. Click the BROWSE button and select the target’s kernel (by partnumber) located by default at C:\Program Files\EZ
Ladder\Kernel\
The following are kernel names and descriptions:
File Name
Description
HEC_HMI.dat
Kernel for HEC-HMI
To be Used on (Partnumber)
HEC-HMI-2, HEC-HMI-4, HEC-HMI-C2100, HEC-HMI-C2150, HEC-HMI-C4100, HEC-HMI-C4150
8. Click the OPEN button to finish the kernel selection. Make sure the correct kernel is chosen.
9. Click the UPDATE TARGET button to install the kernel.
10. A dialog box will appear to show the status of the kernel installation. This could take a several minutes to install.
11. When the status dialog window closes, the installation is complete. The HEC-HMI is ready to use and may be connected to
and programs may be downloaded.
The HEC-HMI Serial Number is factory set and cannot be changed.
PAGE 7
HEC-HMI Basics
This section provides you an overview of the HEC-HMI basics. Some of the basics that are covered are:
Front Panel Features
Wire Entry
Assembly / Disassembly
Internal Connections and Options
HEC-HMI Basics
Getting to Know the HEC-HMI
The HEC-HMI-C4150 is a powerful HMI and Programmble Logic Controller combined in one package, designed to communicate
with other devices using Divelbiss OptiCAN or Modbus. The HEC-HMI boasts a 4x20 backlit LCD display, four navigation buttons (up,
down, left, right), Enter and four programmable buttons and four programmable LED indicators that may be used to display warnings, view data or change set points.
The HEC-HMI-C4150 is housed in a rugged, plastic enclosure and can operate from -40°C to +80° C (using the internal display
heater), making it a valuable tool in harsh environments where temperature extremes are encountered.
Power OK LED
Programmable LEDs
Typical 4 Places
LCD Display Window
Watchdog LED
Navigation Buttons
Programmable Buttons
Typical 4 Places
Mounting Holes x 3
Typical Each Side
Wire Glands
Figure 4 - External Features
PAGE 9
HEC-HMI Basics
The HEC-HMI-C4150 supports many options and features. Many of the HEC-HMI features are selectable and must configured by
setting switch positions or jumpers internally in the HEC-HMI. To gain access to the internal connections and features, please see
the HEC-HMI Assembly / Disassembly part of this manual section.
The following will get you familiar with the internal design of the HEC-HMI.
SW1
CONFIGURATION
SWITCH
JMP2
SERIAL PORT
VOUT SELECT
TS1,TS4, TS5, TS10,
TS17
SEE DETAIL
JMP1
CAN PORT
TERMINATION
TS8
GPI0 / CNTR1
GPI1 / CNTR2
TS12
INPUT POWER
CONNECTION
TS9,TS13, TS14,
TS15, TS16
SEE DETAIL
Wire Gland Entry
SW2
CONFIGURATION
SWITCH
Figure 5 - Internal Features
PAGE 10
HEC-HMI Basics
The following diagram provides details for all the HEC-HMI-C4150 connections for Power, Communications and I/O. In addition, it
also illustrates all the field configuration jumpers and switches with a label of each possible configuration. Each jumper and switch
setting is covered in more detail in other sections of this manual.
TERMINAL BLOCK
DETAILS
Figure 6 - Field Selectable Options
HEC-HMI Assembly / Disassembly
All configuration jumpers and terminal blocks are located inside the HEC-HMI enclosure. To configure the unit or to wire the unit,
you must first gain access to the rear of the unit. If mounted to a surface, first un-mount the HEC-HMI to gain access to the rear
(back side) of the unit. Removing the four screws as shown will allow the back of the unit’s enclosure to be removed.
After configuration and wiring is complete, re-assemble the unit in reverse order. Align rear cover, install and tighten four screws as
shown. If the unit was un-mounted, re-mount the unit to the original location.
PAGE 11
HEC-HMI Basics
REMOVE 4 SCREWS
TO DIS-ASSEMBLE
AND GAIN ACCESS TO
INTERNAL WIRING AND
FEATURES
Figure 7 - Assembly / Disassembly
Wiring to the HEC-HMI
Before the HEC-HMI can be wired, it must be dis-assembled first, see the HEC-HMI Assembly / Disassembly of this manual.
All real-world connections on the HEC-HMI are terminal blocks. To allow wire entry into the HEC-HMI enclosure, use the wire glands
that are provided. There will be one or two glands factory installed, based on the actual model number of the HEC-HMI. HEC-HMI
Controllers are shipped with two glands installed, while HEC-HMI without controller is shipped with only one gland factory installed.
To loosen the glands and allow for wire installation, turn the locking nut counter-clockwise. As the nut is repeatedly turned, it will
move outward, releasing the tension on the actual wire entry area. Feed the wires into the glands and route the wires internally in
the HEC-HMI as shown. Refer to Figure 8.
All the provided terminal contact blocks will accept wire from 16 AWG to 26 AWG. For best results, use the size and type of wire
appropriate for the function such as the minimum wire size necessary for the I/O or high quality shielded wire for analog inputs to
promote noise immunity.
PAGE 12
HEC-HMI Basics
ROUTE WIRING AWAY
FROM COMPONENTS
INTO TERMINAL BLOCKS.
USE THE LEFT GLAND FOR INPUT
POWER AND I/O AND THE RIGHT FOR
COMMUNICATIONS AND COUNTERS.
WIRE ENTERS
GLAND HERE.
Figure 8 - Typical Internal Wire Routing
PAGE 13
HEC-HMI Basics
Mounting the HEC-HMI
The HEC-HMI is designed to directly mount to any relatively small flat surface or brackets. There are 6 different holes located in the
back mounting flange. The HEC-HMI can be mounted using any combination of these mounting holes and appropriate screws or
bolts as required. Refer to Figure 9.
MOUNTING HOLES ON
EACH SIDE (X2)
MOUNTING HOLES IN
EACH CORNER (X4)
Figure 9 - Mounting & Dimensions
PAGE 14
HEC-HMI Basics
HEC-HMI Specifications
Processor
PLCHIP-M2-25620 (PLC on a Chip™)
User Program RAM
4K
User Program Flash
64K
Retentive Memory
100 Bytes
EEPROM Memory
2792 Bytes
Temperature Range
-40°C to 80°C
RoHS Status
RoHS Compliant
Environmental
Seal Enclosure, Rated NEMA 4X, IP66, UL94V-0
Mounting
Mounts to Panel using provided mounting holes.
Dimensions
5.8” Height x 8.2” Width x 2.4” Depth
Input Voltage
8-32 VDC
Input Current Max.
12.25ADC
Input Current Typical (no I/O)
110mADC
Display Type
Liquid Crystal Display (LCD)
Display Backlight
Yes, Controlled from Ladder Diagram
Display Heater
Yes, Can be enabled or disabled via Switch.
Display Size
4 Row, 20 Column
Status LED Indicators
Qty 2, Power (PWR) and Watchdog (WD)
Programmable LEDs
Qty 4, Controlled from Ladder Diagram
Qty 9, Up, Down, Left, Right, Center, F1, F2, F3 and F4. Programmable in Ladder Diagram as digital inputs (contacts).
Programming Port
Yes, Terminal Block Connection, RS232
Programming Language
Ladder Diagram using EZ LADDER Toolkit. Program Baud Rate = 57.6K
Multipurpose Serial Port
Yes, Terminal Block Connection, RS232, RS422 or RS485 - Switch Selectable.
CAN Port
Yes, Supports J1939 and Divelbiss OptiCAN
Supported Networks
J1939 and OptiCAN on CAN Port, Modbus Slave on Multipurpose Serial Port.
Wire Entry
Through Gland on bottom of HEC-HMI Enclosure
Digital Inputs
Qty 6, 4 Dedicated and 2 that may be used as High Speed Counter Inputs or Digital Inputs
Digital Input Rating
Sinking Inputs , 8-32VDC, Optically Isolated
Digital Input De-bounce
Standard for 4 Dedicated Inputs. 2 High Speed Counter Inputs De-bounce is Controlled in the Ladder Diagram.
High Speed Counter Inputs
Qty 2 (using 2 of the Digital Inputs). Max Frequency 250KHz.
High Speed Counter Input Type
User Switch Selectable, PNP or NPN (internal pull-up)
High Speed Counter Voltage
User Switch Selectable 2.5V - 5VDC or 5-32VDC
Digital Outputs
6 Total, 4 Solid-State and 2 Relay
Solid-State Digital Outputs
Sourcing, (Equal to Input Voltage). 4 Amp SEE NOTE 1 Maximum per output pair. Can operate as On/Off Outputs or as
Pulse Width Modulation (PWM) with frequency of 1.5 Hz to 1.0 KHz. Solid-State outputs have current feedback as
analog inputs for closed loop control.
Relay Outputs:
Normally Open, Dry Contact. Rated 2 Amps Resistive.
Analog Inputs:
Qty 2 External, Qty 6 Internal.
External Analog Inputs
Rated 0-5VDC or 0-20mADC, User Switch Selectable.
Internal Analog Inputs
4 Current Feedback Channels for PWM Outputs, 1 Input Power Monitor Channel
Analog Input Resolution
15-bit
NOTE 1: 4ADC Total @ up to 50 º C Maximum per 2 Output Channels. Channels paired as GPO0 / GPO1 and GPO2 / GPO3. Total Current is sum of both paired output channels. See Output De-Rating Diagram (in Digital I/O Section) for maximum output current per output channel pair based on ambient temperature. All Specifications Subject to Change Without Notice.
PAGE 15
HEC-HMI Power
This section explains the connections and power requirements necessary to operate the HEC-HMI. In addition, this section covers
additional information on power related features that may be used in the ladder diagram application software.
Input Power
The HEC-HMI will operate over a 8 to 32 VDC input voltage range. The current required will vary based on actual features used and
environmental conditions. Maximum current is worst case scenario with maximum current in use for each of the HEC-HMI’s features including backlighting, heater, all PWM outputs at full load, etc.
The input power terminal Block TS12 is rated for 10 Amps and can accept wire size from 26 AWG to 16 AWG. It is recommended if
the total input current will exceed 8 Amps, wire the input power to a second point. This second point can be wired directly to TS17.
Maximum Current:
Typical Current (Excluding I/O):
Input Voltage Range:
12.25ADC
110mADC @ 12VDC, 90mADC @ 24VDC
8-32VDC
Input Power Connections
The input power is connected to the HEC-HMI via the provided terminal blocks as shown in Figure 10. The HEC-HMI back cover
must be removed to connect the input power, see the HEC-HMI Basics section. Should the input current with I/O be greater than 8
Amps, a second +V input supply wire should be used. Refer to Outputs section for alternative Power Connections.
PRIMARY INPUT POWER SCHEMATIC
TS12
PRIMARY INPUT POWER WIRING
Figure 10 - Input Power Diagrams
HEC-HMI Power
Input Power Monitor
The HEC-HMI includes a voltage monitor that constantly reads the input voltage as an analog input. This analog input can be accessed in the ladder diagram program as an integer variable labeled AN3. This variable is automatically created when the HEC-HMI
target is selected in the Project Settings Dialog.
As this is an integer value, it must be converted and scaled in the ladder diagram before it can be used as a process variable. The
input should be scaled between 0-40 (0-40VDC). When scaling, use this equation.
InputV = (AN3 / AINScale) x (MaxScale)
Where:
InputV = Input Voltage (real variable) 0.0 to 40.0
AN3 = Automatically created variable
AINScale = 32767
MaxScale = 40.0 (Real Variable to be created)
AIN Resolution = 15-bit
Figure 11 is the same equation, as a EZ LADDER Toolkit ladder diagram program. Note, the Analog input is converted to a REAL for
calculations. This program can be found in HEC-HMI Resource Zip file from our website (http://www.divelbiss.com).
Figure 11 - Power Monitor Example Ladder Diagram
PAGE 17
Communication Ports
This section explains all the communication options and ports for the HEC-HMI. Included will be descriptions of the types of ports,
the typical circuit diagrams required and optional configurations that are available.
All HEC-HMI models are factory shipped with three communication ports; the Programming Port, the OptiCAN/J1939 Port and a
General Purpose/Modbus Slave Port as RS232, RS422 or RS485 (Field Selectable). Details for each port are listed in this section.
Programming Port
The programming port, labeled COM 0 is used to program the HEC-HMI target using the Divelbiss EZ LADDER Toolkit. This connection is an RS232 serial connection and is required to install the Kernel and to download programs to the HEC-HMI. This port is used
for programming only and cannot be used for communication with any other software or device except EZ LADDER Toolkit.
EZ LADDER Toolkit uses the following settings to communicate to the HEC-HMI. Using any other setting will result in communications failures. These parameters are set within EZ LADDER Toolkit (some cannot be changed). You must select the correct COM Port
to which the programming cable is connected to (on the PC). EZ LADDER Toolkit only lists available comports.
Baud Rate: 57600
Parity: None
Data Bits: 8
Stop Bits: 1
Connect your PC to the HEC-HMI via the provided terminal blocks as shown in Figure 12. The HEC-HMI back must be removed to
connect the input power, see the HEC-HMI Basics section. The HEC-HMI-PGM programming cable is required or you may construct
your own cable as shown.
To reduce communication problems when using a USB to Serial Converter, please select a high quality manufacturer. A USB to Serial
Converter that allow direct control over buffering is preferable. Divelbiss Corporation offers a model ideal for this purpose.
PROGRAM PORT CONNECTIONS SCHEMATIC
Figure 12 - Program Port Connections
Communication Ports
Modbus, General Purpose Serial Port
The HEC-HMI provides a second serial port (COM 1) in addition to the programming Port. This port may be used as a general purpose serial port for printing to other devices using the SERIAL_PRINT function in EZ LADDER or it may be used on a Modbus network
as a Modbus Slave.
COM 1 may be used as an RS232, RS422 or RS485. The mode of operation is dependent upon the wiring and the configuration
of the COM 1 settings in the HEC-HMI using the configuration switch SW1. To use the COM 1 multipurpose serial port, connect to
the COM 1 serial port as shown based on the type of configuration (RS232, RS422 or RS485), then configure the switch settings as
shown Figure 13.
Figure 13 - COM 1 Options Switch Settings
Generally, communications between two devices is generally accomplished using RS232 for short distances or RS422 for longer
distances or where additional electrical noise immunity is required due to the environment the device(s) are installed in or near.
RS485 is generally used for applications where multiple drops (more than two devices) are required.
For the HEC-HMI, RS232 only requires 3 wires, RS422 requires 4 wires while RS485 is a two-wire system.
The EZ LADDER Toolkit COM 1 settings are set in the Project Settings dialog. The parameters are set under Serial Print when using
the port to serially print to an external device or they are set under Modbus when using the port as a slave on a Modbus network.
Refer to the EZ LADDER Toolkit User Manual for details on configuring and using Modbus and Serial Print.
COM 1 PORT CONNECTIONS SCHEMATIC - RS232
SW1
Figure 14 - COM1 RS232 Port Connections
PAGE 19
Communication Ports
SW1
SW1
PAGE 20
Communication Ports
In the event you are connecting the General Purpose Serial Port (COM1) to another smart device that needs to be powered externally, the HEC-HMI provides a power out terminal (labeled +VB). The +VB will supply either 5VDC or the HEC-HMI’s input voltage
(with reverse bias protection) based on the field selectable jumper JMP2. To set this jumper, the unit must be dis-assembled. See
the HEC-HMI Assembly / Disassembly section of this manual.
If the incorrect voltage is selected a connected device could be damaged from over-voltage!
Configure the jumper JMP2 as shown in Figure 17. Removing the jumper completely disconnects all power from the +VB terminal.
Figure 17 - COM1 +VB Power Output Option
OptiCAN Port / J1939 Port
The HEC-HMI can communicate to other devices using it’s on-board CAN bus port. This port supports the J1939 Protocol and the
Divelbiss OptiCAN Protocol.
The CAN bus port may be connected to any J1939 bus, allowing the HEC-HMI to monitor and receive J1939 data broadcasts from
engines, transmissions and more. Refer to the EZ LADDER Manual for 1939 supported features.
The OptiCAN Protocol is a proprietary communication protocol for allowing communications between the HEC-HMI, Controllers and
I/O devices. It is a register based broadcast system. Refer to the EZ LADDER Manual for more details regarding OptiCAN.
Regardless of the bus used, Figures 18 and Figure 19 are typical diagrams for the CAN port.
CAN PORT CONNECTIONS SCHEMATIC
Figure 18 - CAN Port Connections
PAGE 21
Communication Ports
CAN PORT CONNECTIONS WIRING
Figure 19 - Typical CAN Port Wiring
For the CAN bus to operate properly, terminating resistors at each end of the bus are required (typically 120 ohms each). The HECHMI can internally provide the 120 ohm terminating resistor as an option. If the HEC-HMI is physically wired at one of the bus ends,
set the internal JMP1 jumper to enable the terminating resistor as shown in Figure 19. If the HEC-HMI is not physcally wired at one
of the bus ends, set the internal JMP1 jumper to disable the terminating resistor as shown in Figure 20.
Figure 20 - CAN Port Terminating Resistor Option
PAGE 22
User Interface
This section explains the features and basics of the user interface which includes the
LCD display
Backlight Control
Heater Control
Status LEDs
Programmable LEDs
Programmable Horn
User Interface
HMI Display
The HEC-HMI boasts a regular font, 4 line, 20 character
display. This display has a backlight which is controlled in
the ladder diagram project.
To display text and data on the display, the HEC-HMI uses
the LCD_PRINT and LCD_CLEAR function blocks. Using
these blocks to control the display, text and variables can
be displayed and updated as an entire row or can be updated starting with a particular column. The LCD_PRINT function text is formatted per ANSI C printf which provides flexibility. When
printing to the display, the first row (at the top) is always Row 0 and the first column (at the left) is always Column 0.
For details on printing and clearing the display, refer to the EZ LADDER User’s Manual. It provides details on the LCD display printing
and function blocks including formatting control.
Programs with sample displays blocks and menus can be found in the HEC-HMI Resource Zip file from our website (http://www.
divelbiss.com).
The HEC-HMI’s display will function between -40°C and 80°C. Temperatures below 0°C may result in decreased display speed performance while temperatures above 70°C may result in decreased display contrast.
Display Contrast Control
The HEC-HMI’s display contrast is controlled automatically by internal circuits. It will automatically adjust the contrast based on
changes in temperature. The contrast setting is factory set for optimal viewing based generally normal temperature ranges. No
adjustment should be required.
Display Backlight Control
The backlight for the HEC-HMI display is controlled in the ladder diagram project as a coil named BKLGHT. This coil (boolean variable) is automatically created when the HEC-HMI model is selected in the Project Settings. This provides the flexibility of turning off
the backlight to conserve power when operating on batteries. By default, the backlight is turned off. It must be specifically turned
on in the ladder diagram project as shown in Figure 21. An example of this program can be found in the HEC-HMI Resource Zip file
from our website (http://www.divelbiss.com).
Figure 21 - Backlight Control Ladder Diagram
Programmable LEDs
Four programmable LED Indicators (labeled 1 through 4) on the HEC-HMI’s front are provided to aid in the user interface experience. These indicators are controlled by coils in the ladder diagram program. These coils (boolean variables LED1, LED2, LED3
and LED4) are automatically created when the HEC-HMI model is selected in the Project Settings. Each LED indicator is individually
controlled by it’s coil as shown in Figure 22. An example of this program can be found in the HEC-HMI Resource Zip file from our
website (http://www.divelbiss.com).
Figure 22 - Programmble LEDs Control - Ladder Diagram
PAGE 24
User Interface
Status LEDs
Two status LED’s; PWR and WD are provided on the front of the HEC-HMI to alert the status of the
HEC-HMI’s condition. Both are green indicator LEDs.
The PWR Indicator will be illuminated when the input power is within acceptable range (8-32VDC).
If the PWR Indicator is dark, check the input voltage. If the input voltage is within the normal range,
contact Divelbiss Support to have your HEC-HMI serviced.
The WD Indicator identifies the current status of the HEC-HMI. If the WD Indicator is flickering quickly, this indicates that there has
been no kernel loaded on the HEC-HMI. Load the kernel (See Loading the HEC-HMI Kernel section of this manual).
If the WD Indicator is flashing slowly, this indicates the kernel is loaded and the HEC-HMI is waiting for a ladder diagram to be
downloaded (has no program) or that the ladder program is not executing (loaded but not running). To correct this issue, download the program or cause the program to restart by cycling power or clicking the GO button in EZ LADDER Toolkit (when in the Run
mode and connected to the target).
If the WD Indicator is flashing quickly (about 10 times per second), this indicates the kernel and ladder program is loaded and the
ladder program is executing (running).
The HEC-HMI provides a total of Nine programmable buttons. Five of the buttons are placed
to serve as general navigation buttons (Up, Down, Left, Right and Enter (Center)). These are
ideal for scrolling through messages and menus. While these buttons were generally placed
for navigation, they may be used for any purpose in the ladder diagram project. These buttons
are used in the ladder diagram as digital inputs. Contacts (boolean variables) for each button
are automatically created when the HEC-HMI model is selected in the Project Settings. These
variables are PBLT (Left), PBRT (Right), PBUP (Up), PBDN (Down) and PBENT (Center).
The four remaining buttons are placed to serve as general use buttons. Each button may be
programmed and used for any purpose in the ladder diagram project. These buttons are used
in the ladder diagram as digital inputs. Contacts (boolean variables) for each button are automatically created when the HEC-HMI model is selected in the Project Settings. These variables
are F1 (F1), F2 (F2), F3 (F3) and F4 (F4).
Any of the programmable button contacts may be used in the ladder diagram the same as any other contact as shown. Refer to
Figure 23 for a sample of how to use the programmable buttons.
Programs with sample menus using the programmable buttons can be found in the HEC-HMI Resource Zip file from our website
(http://www.divelbiss.com).
Figure 23 - Programmable Buttons - Ladder Diagram
PAGE 25
User Interface
Display Heater Control
To gain the full range of operation on the HEC-HMI, the display has an internal heater. When enabled, the heater will monitor the
temperature and will turn-on when the temperature is at or below 0°C (approximate temperature, typically between 5°C and -5°C).
The heater can be enabled or disabled by an internal switch that is found on SW1. To change the heater setting, the unit must be
dis-assembled. Refer to the HEC-HMI Assembly/Disassembly part of this manual. By default, the heater is factory shipped as enabled, but can be disabled if desired by changing the switch setting as shown in Figure 24.
Figure 24 - Field Selectable Heater On/Off Control
Programmable Horn
A programmable horn is provided for audible feedback situations. The horn is controlled in the ladder diagram project by it’s coil.
The duration the horn is active is controlled only by the horn’s coil. The horn’s frequency is factory set and cannot be changed.
To control the horn, use the horn’s coil (boolean variable BEEP) in the ladder program as shown. The BEEP (boolean variable) for
the horn is automatically created when the HEC-HMI model is selected in the Project Settings. Refer to Figure 25.
Figure 25 - Programmable Horn - Ladder Diagram
PAGE 26
Memory
This section explains the HEC-HMI memory structure and provides details on the amount and types of memory that can be used in
the HEC-HMI.
Memory Overview
The HEC-HMI, as with all other smart devices, requires different types of memory to operate. The HEC-HMI uses the on-board
memory types of the PLC on a Chip™ processor. The PLC on a Chip™ provides both RAM and FLASH memory. These two types of
memory are the basis for all the memory used in the HEC-HMI.
RAM Memory
The HEC-HMI provides 4K bytes (4096 bytes) of RAM. This RAM is the memory the HEC-HMI actually uses to run the ladder diagram. As functions and objects (function blocks, variables, etc.) are added to a ladder diagram, some require bits of RAM to operate while some do not. As the program grows, the amount of unused RAM will decrease.
There is no RAM expansion for the HEC-HMI. In all but few applications, the 4K of RAM will be plenty to complete a program of
thousands of rungs. The determining factor is the mix of variables and functions that use RAM. For example, the Drum_Sequencer
function will use more RAM than many blocks.
To determine how much RAM is used and how much is still available, in EZ LADDER Toolkit, COMPILE the program. The Output
Window will display the amount of RAM that is used and available. If program errors are present, correct the errors and then
COMPILE.. See the example provided in Figure 26.
By default, all variables in a program reside in this RAM and this memory is volatile; meaning if power is lost, the actual contents in
the variables will be lost.
FLASH Memory
The HEC-HMI provides 64K bytes of FLASH. This memory is where the acutal ladder diagram program will reside (is stored) when
loaded into the HEC-HMI. This memory cannot be accessed by the user except as a direct result of the ladder diagram size and being downloaded into the HEC-HMI. As the ladder diagram size grows, so does the amount of FLASH required to store it.
There is no FLASH expansion for the HEC-HMI. In all but few applications, the 64K of FLASH will be plenty to complete a program of
thousands of rungs.
To determine how much FLASH is used and how much is still available, in EZ LADDER Toolkit, COMPILE the program. The Output
Window will display the amount of FLASH that is used and available. If program errors are present, correct the errors and then
COMPILE. See the example provided in Figure 26.
Figure 26 - Memory Usage
Memory
Retentive Memory
As one of the standard features of PLC on a Chip™ and EZ LADDER Toolkit, the HEC-HMI supports the use of Retentive memory.
The HEC-HMI provides 100 bytes of Retentive Memory. This memory actually resides in a PLC on a Chip™ as an EEPROM memory
block. This retentive memory is used to store variables and functions (make variables and functions retentive) whose values or
contents must be maintained when power is lost.
To make variables or functions retentive, a checkbox is provided in the Variable Dialog box (or the Function Properties box). Once
this box is checked, the variable or function is now retentive. When the HEC-HMI detects a power loss, it will automatically store
all these retentive variables (functions) and when power is restored, it will automatically reload all these variables (functions).
As only 100 bytes total is available for Retentive memory. Boolean variables use 2 bytes each, Real and Integer variables use 4
bytes each. Refer to the EZ LADDER Toolkit User’s Manual for more details regarding variables, function and retentive memory.
To determine how much Retentive EEPROM is used and how much is still available, in EZ LADDER Toolkit, COMPILE the program.
The Output Window will display the amount of Retentive EEPROM that is used and available. If program errors are present, correct
the errors and then COMPILE. See the example provided in Figure 26.
EEPROM Memory
As one of the standard features of PLC on a Chip™ and EZ LADDER Toolkit, the HEC-HMI supports the use EEPROM memory that
may be used to store and recall integers in non-volatile memory in the ladder diagram. This can be used to store field adjustable
set points and more.
The HEC-HMI supports 2792 bytes of EEPROM memory. This memory is accessed in the ladder diagram using the EEPROM_READ
and EEPROM_WRITE Function blocks. The same variable type that writes to the EEPROM location should be used to read the EEPROM location. A memory map is recommended for organizing variables stored in EEPROM.
Each EEPROM address is absolute and is one byte in size. Boolean variables fill two bytes while all other variable types fill four
bytes of EEPROM. When writing a boolean to address 0, the actual variable will use addresses 0 and 1 (two bytes). Should you
write an integer variable into address 0, then it would use addresses 0-3. A memory map should be created and used to assign
variable types and addresses prior to coding to ensure that variable size and types are accounted for.
Variable 1 Address - Boolean (2
bytes) uses location 0 and 1.
Variable 2 Address - Integer (4
bytes) uses location 2,3,4 and 5.
Variable 3 Address - Boolean (2
bytes) uses location 6 and 7.
EEPROM ADDRESS LOCATION
Variable & Type
0
1
2
3
4
5
6
7
8
9
Variable 1 (Boolean)
Variable 2 (Integer)
Variable 3 (Boolean)
Figure 27 - EEPROM Memory Locations
EEPROM storage area has a limited number of write cycles; therefore it shouldn’t be used to store data which changes often and
must be re-written often. Writing often to the same location can cause the location to fail.
PAGE 28
Digital I/O
This section will explain the HEC-HMI Controller’s Digital I/O including:
Digital Inputs
High Speed Counter Inputs
Digital Input De-bounce
Solid-State Digital Outputs
Relay Outputs
PWM Outputs
Digital Inputs Overview
The HEC-HMI with Controller includes six digital inputs. These six inputs are grouped into two categories; dedicated inputs and
multi-use inputs. There are two multi-use inputs and four dedicated inputs. For EZ LADDER Toolkit Digital Inputs, GPI is a general
term used to represent General Purpose Input. The HEC-HMI’s inputs are labeled using the same GPI format to match the contacts
(boolean variables) in EZ LADDER Toolkit.
These digital inputs are connected to via the internal terminal blocks provided. Each terminal is rated for 10 Amps and can accept
from 26 AWG to 16 AWG wire size. The digital inputs are located on TS15, TS16 and TS8. See the HEC-HMI Basics section for a
diagram of locations of the terminal blocks.
Dedicated Inputs
The HEC-HMI with Controller includes six digital inputs. Of these six digital inputs, four are dedicated inputs; meaning they are
always digital inputs. Each of these inputs are sinking and will operate from 8-32VDC. Each of the dedicated inputs is designed with
approximately a 20 millisecond de-bounce.
As these inputs are sinking, they require voltage on the input to energize it. The presence of this voltage on an input will result in
the input being read as TRUE in the ladder diagram. Refer to the Figure 28 for Dedicated Digital Input Connections.
DEDICATED INPUT CONNECTIONS SCHEMATIC
Figure 28 - Dedicated Digital Input Connections Schematic
Digital I/O
To read a digital input in a ladder diagram, place and connect the appropriate contact for your needs. The DIRECT CONTACT
and INVERTED CONTACT functions are used to read digital inputs in the ladder diagram. When placing the contact, verify you select
the correct input variable(GPI2- GPI5) from the provided drop-down menu. These boolean variables that represent the dedicated
digital inputs are automatically created when the HEC-HMI Controller (by model number) target is selected in the Project Settings.
Multi-Use Inputs as Digital Inputs
The HEC-HMI with Controller includes six digital inputs. Of these six digital inputs, two (GPI0 and GPI1) can function as either standard digital inputs or as High Speed Counter Inputs. Regardless if two inputs are being used as Digital Inputs or High Speed Counter
Inputs, the same terminals are used (CNT1/GPI0, CNT2/GPI1).
As GPI0 and GPI1 are dual function inputs that operate as digital inputs or high speed counter inputs, each input has a de-bounce
circuit that can be enabled or disabled. The de-bounce circuit is disabled by default as if the inputs were to be used as high speed
counters. If using GPIO or GPI1 as a standard digital input, the de-bounce circuit should be enabled. To enable the de-bounce
circuit, you must energize the coil (boolean variable) for the counter input de-bounce. These boolean variables, GPI0_DEB and
GPI1_DEB are automatically created when the HEC-HMI Controller (by model number) target is selected in the Project Settings.
When the GPI0_DEB or GPI1_DEB coils are true, the de-bounce for the input is active. When false, the de-bounce is not active.
Refer to Figure 29.
Figure 29 - GPI0/GPI1 De-bounce Control - Ladder Diagram
The GPI0 and GPI1 inputs must be configured for the supply voltage. There are two input voltage ranges that are supported:
2.5VDC to 5VDC and 5VDC to 32VDC. The input voltage range is field selectable using the internal SW2 switch block. This switch
block will allow the individual selection for each of the GPI0 and GPI1 inputs. The GPI0 and GPI1 input voltage is factory set for
5-32VDC range. Refer to Figure 30.
Figure 30 - GPI0/GPI1 Field Selectable Voltage Options
The GPI0 and GPI1 inputs can accept a signal from an NPN or PNP device. This is controlled by the internal SW2 switch block. This
block will allow for individual selection for each of the GPI0 and GPI1 inputs. The NPN/PNP setting is factory default to PNP. Refer
to Figure 31.
For PNP input devices, they will source the voltage the input requires (sinking input, sourcing device). When using this mode, the
input contacts will act as all other digital inputs with a True condition in the ladder diagram when voltage is applied to the input.
Figure 32 is diagram of the Internal GPI0 / GPI1 Circuit.
For NPN input devices, they will sink the input source (sourcing input, sinking device). An internal pull-up resistor is provided for
connecting to NPN devices. Figure 32 is a diagram of the Internal GPI0 / GPI1 Circuit. When using this mode, the input contacts will
be reversed from all other digital inputs with a False condition in the ladder diagram when actual input is active and True condition
in the ladder diagram when the actual input is not active.
For proper operation, it is important to configure the GPI0 and GPI1 input settings for both input voltage and type. If the input settings do not correspond the actual input, the input may not operate as expected and the HEC-HMI may be damaged.
PAGE 30
Digital I/O
Figure 31 - GPI0/GPI1 Field Selectable Input Type
Figure 32 - GPI0/GPI1 Typical Input Circuit
Please note: Individually, the GPI0 and GPI1 inputs are designed to be used as a digital input only or high speed counter input only.
EZ LADDER Toolkit will allow the placement of contacts and /or CNTRTMR function in any program. Therefore, you can place and
use the contacts and the CNTRTMR function block in the same program with the same digital input selected. This can be useful
in some programs based on the application, but it is important to know that input contacts will only operate at a fraction of the
frequency that the CNTRTMR function block can accurately read.
Unlike the dedicated digital inputs that are sinking only, the GPI0 and GPI1 can operate as sinking or sourcing based on how the
NPN / PNP settings are configured. Figure 33 provides examples of settings and connections for NPN and PNP devices.
Figure 33 - GPI0/GPI1 Connections - NPN/PNP
To read a digital input in a ladder diagram (both dedicated and multi-use as a digital inputs), place and connect the appropriate contact for your needs. The DIRECT CONTACT and INVERTED CONTACT functions are used to read digital inputs in the ladder diagram.
When placing the contact, verify you select the correct input variable(GPI0- GPI1) from the provided drop-down menu.
These boolean variables that represent the digital inputs are automatically created when the HEC-HMI Controller (by model number) target is selected in the Project Settings. Figure 34 is a typical ladder diagram program using a GPI digital input.
PAGE 31
Digital I/O
Figure 34 - Using Digital Inputs in EZ LADDER Toolkit
Multi-Use Inputs as High Speed Counter Inputs
The HEC-HMI with Controller includes six digital inputs. Of these six digital inputs, two (GPI0 and GPI1) can function as either
standard digital inputs or as High Speed Counter Inputs. Regardless if these inputs are being used as Digital Inputs or High Speed
Counter Inputs, the same terminals are used (CNT1/GPI0, CNT2/GPI1).
As GPI0 and GPI1 are dual function inputs that operate as digital inputs or high speed counter inputs, each input has a de-bounce
circuit that can be enabled or disabled. The de-bounce circuit is disabled by default as if the inputs were to be used as high speed
counters. The de-bounce is only controlled in the ladder diagram using the GPI0_DEB and GPI1_DEB coils. No hardware settings for
de-bounce are required.
CNT1 (GPI0) and CNT2 (GPI1) may be utilized as high speed counters (up counting only). These inputs will accept a maximum
frequency of 250KHz and are optically isolated to promote noise immunity. These inputs are ideal to anywhere that high speed
counting is required; such as calculating RPM, batch counting and more.
The CNT1 and CNT2 inputs must be configured for the supply voltage. There are two input voltage ranges that are supported:
2.5VDC to 5VDC and 5VDC to 32VDC. The input voltage range is field selectable using the internal SW2 switch block. This switch
block will allow the individual selection for each of the GPI0 and GPI1 inputs. The CNT1 and CNT2 input voltage is factory set for
5-32VDC range. The 2.5-5VDC range would typically be used for lower power devices such as hall-effect sensors. Refer to Figure
35.
Figure 35 - CNT1/CNT2 Field Selectable Input Voltage
The CNT1 and CNT2 as counters can will accept a signal from an NPN or PNP device. This is controlled by the internal SW2 switch
block. This block will allow for individual selection for each of the CNT1 and CNT2 inputs. The NPN/PNP setting is factory default
to PNP.
For PNP input devices, they will source the voltage the input requires (sinking input, sourcing device). For NPN input devices, they
will sink the input source (sourcing input, sinking device). An internal pull-up resistor is provided for connecting to NPN devices.
See the provided diagram of the Internal CNT1 / CNT2 Circuit. Refer to Figure 36.
For proper operation, it is important to configure the CNT1 and CNT2 input settings for both input voltage and type. If the input
settings do not correspond the actual device, the counter input may not operate as expected and the HEC-HMI may be damaged.
Figure 36 - CNT1/CNT2 Field Selectable Input Type
PAGE 32
Digital I/O
Figure 37 - CNT1/CNT2 Connections - NPN/PNP
To use CNT1 or CNT2 in a ladder diagram as a high speed counter, you must use the CNTRMR function block. This block, when
placed in the ladder diagram, will provide a drop-down menu to select which counter to use. Refer to the EZ LADDER Toolkit User’s
Manual for details on the CNTRTMR and other function blocks. CNT1 is Counter Channel 1 while CNT2 is Counter Channel 2 in the
CNTRTMR function block. Figure 28 is a typical High Speed Timer Circuit in EZ LADDER.
Please note: Individually, the GPI0/CNT1 and GPI1/CNT2 inputs are designed to be used as a digital input only or high speed counter input only. EZ LADDER will allow the placement of contacts and /or CNTRTMR function in any program. Therefore, you can place
and use the contacts and the CNTRTMR function block in the same program with the same digital input selected. This can be useful
in some programs based on the application, but it is important to know that input contacts will only operate at a fraction of the
frequency that the CNTRTMR function block can accurately read.
The High Speed Counter Inputs CNT1 and CNT2 can operate as sinking or sourcing based on how the NPN / PNP settings are configured. Figure 37 is an example of both NPN and PNP connections.
Figure 38 - Using Counter Inputs in EZ LADDER
PAGE 33
Digital I/O
Digital Outputs Overview
The HEC-HMI with Controller provides six digital outputs. These six inputs are grouped into two categories; solid-state sourcing outputs with PWM capability and dry-contact relay outputs. GPO is a general term used to represent General Purpose Output. The
HEC-HMI’s outputs are labeled using the same GPO format to match the coils (boolean variables) in EZ LADDER Toolkit.
These digital outputs are connected to via the internal terminal blocks provided. Each terminal is rated for 10 Amps and can accept
from 26 AWG to 16 AWG wire size. The digital inputs are located on TS13, TS14 and TS15. See the HEC-HMI Basics section for a
diagram of locations of the terminal blocks.
Solid-State Digital Outputs as General Purpose Outputs
The HEC-HMI with Controller provides six digital outputs. Of these six digital outputs, four are solid-state; meaning they do not
have mechanical moving parts (contacts).
Each of the solid-state outputs may be used as either digital outputs that operate as an ON/OFF function using coils in the ladder
diagram program or Pulse Width Modulation Outputs (PWM) using the PWM blocks in the ladder diagram. For general ON/OFF
control needs, it is recommended that the GPO coils be used. When controlling devices such as valves, where you want to control
the open/close amount in a closed loop system, Pulse Width Modulation is recommended.
These outputs are identified in the EZ LADDER Toolkit and this manual as GPO0 - GPO3. These outputs are sourcing, therefore an
energized output will source an output voltage equal to the controller input voltage.
Each output can drive a load up to maximum current rating listed in the specifications section (Refer to Output De-Rating diagram,
Figure 40 for current and temperature ratings) and includes an automatic over-current shutdown safety. In the event an over current condition exists, the output will shut down. This shut down condition is reset when the output is turned off (set to false) in the
ladder diagram. Loads are based on output pairs (GPO0 & GPO1, GPO2 & GPO3).
Each output requires a minimum load to operate correctly. Depending upon the device connected to an output, a minimum load
resistor may be required. If the output is ON or true regardless of the ladder diagram program, connect a 470Ω to 1KΩ load from
the output to input power common.
As each digital output (GPO0 - GPO3) may be configured and used as a digital output or as a Pulse Width Modulation (PWM). Each
of these four outputs may only be used as either digital output or PWM output only. For information on using digital outputs as
PWM outputs, refer to the Pulse Width Modulation Outputs Section of this manual.
Commutating diodes should be installed on all output channels for noise immunity. If using current feedback, these diodes must be
installed for the feedback reading to be correct.
Additionally, GPO0 - GPO3 also have current sense feedback capability using analog inputs (AN4-AN7 respectively). These analog
inputs can be utilized in the program as control parameters and their resolution is based on the analog inputs resolution of the
HEC-HMI model.
Refer to the Solid-State Output Connections Schematic - Figure 39.
PAGE 34
Digital I/O
SOLID-STATE OUTPUT CONNECTIONS SCHEMATIC
Figure 39 - Solid-State Outputs Connection Schematic - GPO or PWM
SOLID-STATE OUTPUT DE-RATING - LOAD & TEMPERATURE
Max Current Per Output Pair vs.
Temperature
Current (Amps)
5.00
4.00
3.00
2.00
Max Current
1.00
0.00
-40
-20
0
20
40
60
80
Ambient Temperature ( °C)
Figure 40 - Solid-State Output De-Rating Curve
PAGE 35
Digital I/O
To control a digital output in a ladder diagram, place and connect the appropriate coil for your needs. The DIRECT COIL and INVERTED COIL functions are used to control digital outputs in the ladder diagram. When placing the coil, verify you select the correct
output address (GPO0 - GPO3) from the provided drop-down menu. The GPO0 - GPO3 coils (boolean variables are automatically
created when the HEC-HMI model is selected in the Project Settings. Refer to Figure 41.
Figure 41 - Using Digital Outputs in EZ LADDER
When using the digital outputs on the HEC-HMI, regardless if used as digital outputs or PWM, if the total current of the outputs
combined will exceed 8ADC, additional input power connections to the HEC-HMI are required. Refer to the Alternate Input Power
Schematic and Wiring, Figure 42 and Figure 43 respectively.
ALTERNATE INPUT POWER SCHEMATIC
Figure 42 - Alternate Input Power Schematic for High Current Loads
ALTERNATE INPUT POWER WIRING
Figure 43 - Alternate Input Power Wiring for High Current Loads
PAGE 36
Digital I/O
Solid-State Digital Outputs as PWM
As previously noted, the HEC-HMI with Controller includes 4 on-board digital outputs that may be configured individually and
exclusively as either digital outputs or pulse width modulation outputs; therefore, each output may only be used as either digital
output or PWM output. Pulse Width Modulation Outputs allow for a base frequency with an adjustable Duty Cycle. The base
frequency may be changed in the ladder diagram also.
Before Pulse Width Modulation outputs may be used in the ladder diagram, the Pulse Width Modulation Properties must be configured in EZ LADDER Toolkit.
To Configure Pulse Width Modulation (PWM) Outputs in EZ LADDER Toolkit:
1. In EZ LADDER, from the File Menu at the top, click PROJECT then SETTINGS. This will open the Project Settings
Window. The HEC-HMI was previously selected.
2. Click the PROPERTIES button. The HEC-HMI Properties Window will open. Refer to Figure 44.
Figure 44 - HEC-HMI Properties Window
3. Click the PWM PROPERTIES button. The PWM Properties Window will open. Refer to Figure 45.
Figure 45- PWM Properties Window
PAGE 37
Digital I/O
4.
5.
6.
Select the resolution of the PWM channels (8 or 16 bit). Only 4 channels are supported regardless of resolution.
Click the ADD button in the PWM Properties window.
In the ADD PWM dialog, select the channels to install. To select multiple PWM channels, hold the CTRL key while
clicking on the channel. Refer to Figure 46.
Only 4 PWM channels are supported, they are as follows:
Digital Output 0 (GPO0) is PWM 1 (in EZ LADDER)
6. Click OK to close the ADD PWM dialog. The next step is configuring the frequencies.
7. Enter the desired frequency for Clock A and Clock B (if installed). The HEC-HMI has 4 available PWM Channels. These channels are either controlled with Clock A or Clock B. This allows two different PWM frequencies.
Figure 46 - Add PWM Channel Window
The Minimum and Maximum frequencies are displayed in the PWM Properties dialog. The frequency for Clock A and Clock B must be in this range. Refer to Figure 2.9.
Due to limitations of hardware, the Desired Frequency and Actual Frequency may vary. The Actual Frequency will be
the closest attainable frequency to the entered Desired Frequency. The Minimum and Maximum frequencies are
displayed.
8. Click OK to close the PWM Properties Window. Click OK to close the HEC-HMI Properties Window and click OK to close
the Project Settings Window.
Refer to Figure 39 for PWM channel connections. Commutating diodes should be installed on all PWM output channels as shown
for noise immunity. As the internal circuit is still a solid-state output, regardless whether configured as a digital output or a PWM
output, all current limitations apply including the de-rating based on load and temperature. See the Digital Outputs part of this
manual section and refer to Figure 40. If load current totals are to exceed 8 Amps, follow the recommendation for alternative
power connections, see Figures 43 and 44. The same minimum load is required for PWM as for GPO operation.
With the Pulse Width Modulation Outputs configured in EZ LADDER, they can now be used in the ladder diagram project. The
PWM channel(s) are controlled in the ladder diagram by the PWM and PWM_FREQ function blocks. For each PWM channel required, a PWM function block is required. Typically, PWM Outputs operate at a set frequency while the Duty Cycle is adjusted to
vary the output. The Duty Cycle is a variable input to the PWM function block. In the event the frequency must be changed during
operation, the PWM_FREQ function block is used. Refer to the EZ LADDER Toolkit User’s Manual for more detail regarding function
blocks and variables. See Figure 47.
Figure 47- Using PWM in EZ LADDER
PAGE 38
Digital I/O
Relay Outputs
Of the HEC-HMI’s six digital outputs, two are relay outputs. These relay outputs are configured as SPST, Normally open (dry contact). These relay digital outputs operate as an ON/OFF function using coils in the ladder diagram program.
These outputs are identified in the EZ LADDER Toolkit, on the HMI’s terminal blocks and this manual as GPO4 - GPO5. These outputs are dry contacts; therefore they may be used in nearly any application with any voltage provided the maximum 2 Amp current
rating is not exceeded per point.
The GPO4 and GPO5 relay outputs are located on TS14 and TS15. Connect the relay output contacts as shown in Figure 48.
Figure 48- Relay Output Connections
To use GPO4 or GPO5 in a ladder diagram, place a coil in the ladder diagram, use the drop-down menu to select which Output to
use (GPO4 or GPO5). Refer to Figure 49 for a typical Relay Output Circuit in EZ LADDER.
Figure 49- Using PWM in EZ LADDER
PAGE 39
Analog I/O
This section will explain the HEC-HMI Controller’s Analog I/O including:
Analog Inputs
Internal Current Feedback Analog Inputs
Analog Input Resolution
Analog Inputs Overview
The HEC-HMI with Controller includes 7 usable analog inputs. These inputs are grouped into two categories; real world analog
inputs and internal inputs. There are two real world inputs (AN0, AN1), 4 (AN4,AN5, AN6, AN7) internal inputs used for solid-state
output current feedback and the one Input Power Monitor analog input (AN3) referred to in an earlier section. AN2 is not available
for use. AN is used to represent the analog inputs in the EZ LADDER Toolkit software. The HEC-HMI’s analog inputs (terminals) are
labeled using the same AN format.
These digital inputs are connected to via the internal terminal blocks provided. Each terminal is rated for 10 Amps and can accept
from 26 AWG to 16 AWG wire size. The digital inputs are located on TS9. See the HEC-HMI Basics section for a diagram of locations
of the terminal block.
The analog input resolution (for all analog inputs) is 15-bit, meaning the maximum scale for the analog inputs is 32767. Analog
inputs are always INTEGER variables in EZ LADDER. If a REAL is required, the analog input will have to be converted using the REAL
function block.
A Moving Average function block (MAVG) is provided in EZ LADDER Toolkit. This function block allows for an easy to create moving
average of an analog input.
Real World Analog Inputs
Of the Analog Inputs, the HEC-HMI with Controller provides 2 real world analog inputs. These two inputs are field selectable for
0-20mADC or 0-5VDC. They are identified on the terminal block and in the EZ LADDER Toolkit ladder diagram as AN0 and AN1. The
AN0 and AN1 Integer variables are automatically created when the HEC-HMI target is selected in the Project Settings.
Each variable (AN0 - AN1) will represent the actual current reading on the analog input as an integer number (15-bit with a maximum scale of 32767). To use the analog input reading, place the appropriate analog input variable as an input to function blocks.
See Figure 52.
Figure 51 shows the typical connections for using the analog inputs. Ideally, analog inputs should be wired using high quality
shielded wire. To promote noise immunity, the shield should only be connected at one end.
AN0 and AN1 may be field configured individually for 0-5VDC or 0-20mADC. This is done by setting the internal configuration
switches on SW1 and SW2. Refer to Figure 50 for setting the SW1 and SW2 analog input type.
It is important configure the analog input type to match the actual analog input (0-5VDC or 0-20mADC). Failure to match these settings may result in damage to the HEC-HMI.
Analog I/O
Figure 50 - Analog Input Configuration Switches
Figure 51 - Analog Input Connections Schematic
Figure 52 - Using Analog Inputs in EZ LADDER
Solid-State Output Current Feedback
The HEC-HMI provides current feedback for each Solid-State Output/PWM channel (GPO0 - GPO3). Each of these four outputs are
internally monitored using analog inputs (AN4-AN7 respectively). This analog feedback represents the output current from 0 to 4
Amps.
As with all other analog inputs, these variables are created automatically when the HEC-HMI’s target is selected and configured.
The resolution of these feedback analog input channels is dependent upon the model number of the HEC-HMI and will be equal
to the real world analog inputs (AN0, AN1) including resolution, maximum scale, etc. In this case, 15-bit with a maximum scale of
32767.
These analog inputs may be used in combination with function blocks in circuits to calculate the actual output current on the PWM
channel and then use this current in a control algorithm.
Commutating diodes must be installed on Solid-State Output channels when using the current feedback analog inputs. Failure to
use commutating diodes will result in incorrect current feedback readings. See Figure 39.
PAGE 41

HEC-HMI-C4150-ER

Transcription

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